986
FNCA52 TJSJ 110924
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
524 AM AST SUN JAN 11 2026
DISCUSSION
KBDI VALUES IN CABO ROJO ARE AROUND 578, WHILE IN CAMP SANTIAGO,
THEY ARE AROUND 536. RH VALUES WILL DROP NEAR CRITICAL VALUES THIS
AFTERNOON; HOWEVER, WE EXPECT SHOWER ACTIVITY TO FORM OVER THE
SOUTHWEST QUADRANT FROM NOON ONWARD. ADDITIONALLY, WINDS WILL
RANGE BETWEEN 10 AND 16 MPH WITH HIGHER GUSTS DUE TO SEA BREEZE.
WE ENCOURAGE THE FIRE-WEATHER COMMUNITY TO MONITOR THE DRYING
TREND, AS CONDITIONS COULD WORSEN IF NO RAINFALL OCCURS OVER THESE
LOCATIONS.
PRZ014-120930-
SOUTHEAST COASTAL PLAINS-
524 AM AST SUN JAN 11 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 10 30
TEMP (24H TREND) 87 (+2) 67 (-2) 87
RH % (24H TREND) 50 (-4) 92 (0) 48
WIND 20FT/EARLY(MPH) E 14 G20 NE 11 E 14 G20
WIND 20FT/LATE(MPH) E 14 G20 NE 11 E 14 G20
MIXING HGT(FT-AGL/MSL)4750 4700
TRANSPORT WND (MPH) E 12 E 10
VENT RATE (KT-FT) 47500 42300
DISPERSION 5 5
DSI 5 3 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-120930-
SOUTHERN HILLS-
524 AM AST SUN JAN 11 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 0 20
TEMP (24H TREND) 83 (+3) 64 (-3) 83
RH % (24H TREND) 63 (-5) 99 (+5) 63
WIND 20FT/EARLY(MPH) E 11 NE 8 E 11
WIND 20FT/LATE(MPH) E 11 NE 8 E 11
MIXING HGT(FT-AGL/MSL)4830 4920
TRANSPORT WND (MPH) E 10 E 10
VENT RATE (KT-FT) 43470 44280
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-120930-
NORTH COASTAL PLAINS-
524 AM AST SUN JAN 11 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 60 40 50
TEMP (24H TREND) 85 (+1) 67 (-3) 85
RH % (24H TREND) 63 (-6) 100 (+2) 63
WIND 20FT/EARLY(MPH) E 16 E 12 E 16
WIND 20FT/LATE(MPH) E 16 E 12 E 16
MIXING HGT(FT-AGL/MSL)4400 4540
TRANSPORT WND (MPH) E 14 E 14
VENT RATE (KT-FT) 52800 54480
DISPERSION 5 5
DSI 6 5 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-120930-
NORTHERN HILLS-
524 AM AST SUN JAN 11 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 10 60
TEMP (24H TREND) 83 (+1) 65 (-3) 84
RH % (24H TREND) 64 (-4) 100 (+1) 63
WIND 20FT/EARLY(MPH) NE 13 E 10 E 13
WIND 20FT/LATE(MPH) NE 13 E 10 E 13
MIXING HGT(FT-AGL/MSL)4650 4890
TRANSPORT WND (MPH) E 13 E 12
VENT RATE (KT-FT) 51150 48900
DISPERSION 5 5
DSI 6 3 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-120930-
WEST COAST-
524 AM AST SUN JAN 11 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 70 30 40
TEMP (24H TREND) 86 (+1) 66 (-2) 86
RH % (24H TREND) 62 (-3) 99 (+4) 61
WIND 20FT/EARLY(MPH) SE 14 E 13 E 12
WIND 20FT/LATE(MPH) SE 14 E 13 E 12
MIXING HGT(FT-AGL/MSL)4110 4060
TRANSPORT WND (MPH) E 10 E 8
VENT RATE (KT-FT) 36990 28420
DISPERSION 5 5
DSI 5 3 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-120930-
EASTERN INTERIOR-
524 AM AST SUN JAN 11 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 60 30 50
TEMP (24H TREND) 83 (+2) 65 (-3) 83
RH % (24H TREND) 63 (-7) 100 (+2) 65
WIND 20FT/EARLY(MPH) E 10 E 9 E 10
WIND 20FT/LATE(MPH) E 10 E 9 E 10
MIXING HGT(FT-AGL/MSL)4880 4930
TRANSPORT WND (MPH) E 10 E 10
VENT RATE (KT-FT) 43920 44370
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-120930-
LUQUILLO MOUNTAIN RANGE-
524 AM AST SUN JAN 11 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 60 50 50
TEMP (24H TREND) 79 (+2) 64 (-3) 79
RH % (24H TREND) 69 (-6) 100 (+1) 71
WIND 20FT/EARLY(MPH) E 8 E 8 E 9
WIND 20FT/LATE(MPH) E 8 E 8 E 9
MIXING HGT(FT-AGL/MSL)4310 3870
TRANSPORT WND (MPH) E 12 E 12
VENT RATE (KT-FT) 43100 38700
DISPERSION 5 5
DSI 5 3 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-120930-
CENTRAL MOUNTAIN RANGE-
524 AM AST SUN JAN 11 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS NONE SHOWERS
CHANCE PRECIP (%) 70 0 50
TEMP (24H TREND) 81 (+2) 62 (-3) 81
RH % (24H TREND) 64 (-5) 100 (+2) 63
WIND 20FT/EARLY(MPH) E 11 E 9 E 9
WIND 20FT/LATE(MPH) E 11 E 9 E 9
MIXING HGT(FT-AGL/MSL)5060 5270
TRANSPORT WND (MPH) E 10 E 9
VENT RATE (KT-FT) 45540 42160
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-120930-
CAYEY MOUNTAIN RANGE-
524 AM AST SUN JAN 11 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 30 50
TEMP (24H TREND) 79 (+2) 65 (-2) 79
RH % (24H TREND) 68 (-5) 100 (+1) 71
WIND 20FT/EARLY(MPH) E 10 E 6 E 9
WIND 20FT/LATE(MPH) E 10 E 6 E 9
MIXING HGT(FT-AGL/MSL)4910 4640
TRANSPORT WND (MPH) E 12 E 12
VENT RATE (KT-FT) 49100 46400
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-120930-
VIEQUES-
524 AM AST SUN JAN 11 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 40 40
TEMP (24H TREND) 85 (0) 70 (-2) 85
RH % (24H TREND) 58 (-4) 98 (+3) 59
WIND 20FT/EARLY(MPH) E 11 E 11 E 11
WIND 20FT/LATE(MPH) E 11 E 11 E 11
MIXING HGT(FT-AGL/MSL)3590 3400
TRANSPORT WND (MPH) E 13 E 14
VENT RATE (KT-FT) 39490 40800
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-120930-
CULEBRA-
524 AM AST SUN JAN 11 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 50 40
TEMP (24H TREND) 85 (0) 72 (-2) 85
RH % (24H TREND) 59 (-5) 96 (+5) 60
WIND 20FT/EARLY(MPH) E 11 E 11 E 12
WIND 20FT/LATE(MPH) E 11 E 11 E 12
MIXING HGT(FT-AGL/MSL)3630 3470
TRANSPORT WND (MPH) E 14 E 15
VENT RATE (KT-FT) 43560 45110
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-120930-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
524 AM AST SUN JAN 11 2026
TODAY TONIGHT MON
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 40 0 10
TEMP (24H TREND) 87 (+1) 66 (-3) 87
RH % (24H TREND) 49 (-4) 95 (+3) 50
WIND 20FT/EARLY(MPH) SE 14 G18 E 11 E 14 G20
WIND 20FT/LATE(MPH) SE 14 G18 E 11 E 14 G20
MIXING HGT(FT-AGL/MSL)4630 4570
TRANSPORT WND (MPH) E 8 E 9
VENT RATE (KT-FT) 32410 36560
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-120930-
SAINT THOMAS AND SAINT JOHN-
524 AM AST SUN JAN 11 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 50 20
TEMP (24H TREND) 85 (+1) 71 (-3) 85
RH % (24H TREND) 60 (-6) 97 (+4) 59
WIND 20FT/EARLY(MPH) E 11 E 13 E 11
WIND 20FT/LATE(MPH) E 11 E 13 E 11
MIXING HGT(FT-AGL/MSL)3650 3440
TRANSPORT WND (MPH) E 15 E 14
VENT RATE (KT-FT) 47450 41280
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-120930-
ST CROIX-
524 AM AST SUN JAN 11 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 50 20
TEMP (24H TREND) 86 (+1) 71 (-3) 86
RH % (24H TREND) 60 (-5) 96 (+7) 61
WIND 20FT/EARLY(MPH) E 11 E 12 E 11
WIND 20FT/LATE(MPH) E 11 E 12 E 11
MIXING HGT(FT-AGL/MSL)4630 4280
TRANSPORT WND (MPH) E 14 E 14
VENT RATE (KT-FT) 55560 51360
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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